Prevent urls in headings

src/librustdoc/html/markdown.rs

@@ -380,7 +380,11 @@ impl<'a, 'b, 'ids, I: Iterator<Item = Event<'a>>> Iterator for HeadingLinks<'a,
                     }
                     _ => {}
                 }
-                self.buf.push_back(event);
+                match event {
+                    Event::Start(Tag::Link(_, _, text)) => self.buf.push_back(Event::Text(text)),
+                    Event::End(Tag::Link(..)) => {}
+                    event => self.buf.push_back(event),
+                }
             }
             let id = self.id_map.derive(id);
 
@@ -395,7 +399,7 @@ impl<'a, 'b, 'ids, I: Iterator<Item = Event<'a>>> Iterator for HeadingLinks<'a,
 
             let start_tags = format!(
                 "<h{level} id=\"{id}\" class=\"section-header\">\
-                                      <a href=\"#{id}\">",
+                    <a href=\"#{id}\">",
                 id = id,
                 level = level
             );

src/test/rustdoc/remove-url-from-headings.rs

@@ -0,0 +1,12 @@
+#![crate_name = "foo"]
+
+// @has foo/fn.foo.html
+// !@has - '//a[@href="http://a.a"]'
+// @has - '//a[@href="#implementing-stuff-somewhere"]' 'Implementing stuff somewhere'
+
+/// fooo
+///
+/// # Implementing [stuff](http://a.a) somewhere
+///
+/// hello
+pub fn foo() {}